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SPTSZSPSC - South Pole Telescope Sunyaev-Zel'dovich Survey Point Source Catalog (2020)

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Overview

This database table presents the catalog of emissive point-sources detected in the South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey, which is a contiguous 2530 deg2 area surveyed between 2008-2011 in three bands centered at 95, 150, and 220 GHz. The catalog contains 4845 sources measured at a significance of 4.5 sigma or greater in at least one band, corresponding to detections above approximately 9.8, 5.8, and 20.4 mJy in 95, 150, and 220 GHz, respectively. Spectral behavior in the SPT bands is used for source classification into two populations based on the underlying physical mechanisms of compact, emissive sources that are bright at millimeter wavelengths: synchrotron radiation from active galactic nuclei and thermal emission from dust. The latter population includes a component of high-redshift sources often referred to as submillimeter galaxies (SMGs). In the relatively bright flux ranges probed by the survey, these sources are expected to be magnified by strong gravitational lensing. The survey also contains sources consistent with protoclusters, groups of dusty galaxies at high redshift undergoing collapse. The authors cross-match the SPT-SZ catalog with external catalogs at radio, infrared, and X-ray wavelengths and identify available redshift information. The catalog splits into 3980 synchrotron-dominated and 865 dust-dominated sources and determines a list of 506 SMGs. 10 sources are identified as stars.

The SPT is a 10-m telescope located at the Amundsen-Scott South Pole station in Antarctica. At 150 GHz (2 mm), the SPT has arcminute angular resolution and a 1 deg2 diffraction-limited field of view. The SPT was designed for high-sensitivity millimeter/sub-millimeter observations of faint, low-contrast sources, such as CMB anisotropies. The first survey with the SPT, designated as the SPT-SZ survey, was completed in 2011 November and covers a ~2500 deg2 region of the southern extragalactic sky in three frequency bands, 95, 150, and 220 GHz, corresponding to wavelengths of 3.2, 2.0, and 1.4 mm. The fields were surveyed to depths of approximately 40, 18, and 70 microK arcmin at 95, 150, and 220 GHz, respectively.

This study uses data from 19 fields observed by the SPT between 2008 and 2011. The fields are referred to using the J2000 coordinates of their centers, Right Ascension in hours and Declination in degrees. Table 1 in the reference paper lists the positions and effective areas of these fields.The total effective area used for the catalog and analysis in this present work is 2530 deg2. The catalog is an extension of two previous works: Vieira et al. (2010, ApJ, 719, 763) and Mocanu et al. (2013, ApJ, 779, 61) and builds on the same analysis pipeline, adding 1759 deg2 of newly analyzed data, and additional data for two fields which were re-observed in 2010 and 2011.

Catalog Bibcode

2020arXiv200303431E

References

Millimeter-wave Point Sources from the 2500-square-degree SPT-SZ
Survey: Catalog and Population Statistics
    Everett, W. B., Zhang, L., Crawford, T. M., Vieira, J. D.,
    Aravena, M., Archipley, M. A., Austermann, J. E., Benson, B. A.,
    Bleem, L. E., Carlstrom, J. E., Chang, C. L., Chapman, S.,
    Crites, A. T., de Haan, T., Dobbs, M. A., George, E. M.,
    Halverson, N. W., Harrington, N., Holder, G. P., Holzapfel, W. L.,
    Hrubes, J. D., Knox, L., Lee, A. T., Luong-Van, D., Mangian, A. C.,
    Marrone, D. P., McMahon, J. J., Meyer, S. S., Mocanu, L. M.,
    Mohr, J. J., Natoli, T., Padin, S., Pryke, C., Reichardt, C. L.,
    Reuter, C. A., Ruhl, J. E., Sayre, J. T., Schaffer, K. K., Shirokoff, E.,
    Spilker, J. S., Stalder, B., Staniszewski, Z., Stark, A. A., Story, K. T.,
    Switzer, E. R., Vanderlinde, K., Weiss, A., and Williamson, R.
    <arXiv e-prints, arXiv:2003.03431(2020)>
    =2020arXiv200303431E

Provenance

This table was originally created by the HEASARC in January 2014. It was updated to the 2020 version of this catalog in July 2020, based on a machine-readable catalog which was obtained from the LAMBDA website.

Parameters

Name
The IAU J2000.0 position-based designation for the SPT detected source, using the prefix 'SPT-S' for 'South Polar Telescope-Sunyaev-Zel'dovich'.

RA
The Right Ascension of the mm source in the selected equinox. The RA was given in J2000.0 decimal degrees to a precision of 0.00001 degrees (0.036 arcseconds) in the original table.

Dec
The Declination of the mm source in the selected equinox. The Dec was given in J2000.0 decimal degrees to a precision of 0.00001 degrees (0.036 arcseconds) in the original table.

LII
The Galactic Longitude of the mm source.

BII
The Galactic Latitude of the mm source.

SNR_95_GHz
The detection significance (S/N) of the mm source in the 95-GHz band. To be included in this catalog, a source has to have at least a 4.5-sigma or greater significance in at least one band.

Raw_Flux_95_GHz
The raw flux density of the mm source, i.e., uncorrected for flux density boosting, in the 95-GHz band, in mJy.

Flux_95_GHz
The deboosted flux density of the source at 95 GHz, in mJy. This value, the value plus the positive error and the value minus the negative value encompass 16%, 50%, and 84% (68% probability enclosed, or 1 sigma for the equivalent normal distribution) of the cumulative posterior probability density for the 95-GHz flux, as estimated using the deboosting procedure described in Section 3 of the reference paper.

Flux_95_GHz_Pos_Err
The upper (positive) 1-sigma uncertainty in the deboosted 95-GHz band flux density, in mJy.

Flux_95_GHz_Neg_Err
The lower (negative) 1-sigma uncertainty in the deboosted 95-GHz band flux density, in mJy.

SNR_150_GHz
The detection significance (S/N) of the mm source in the 150-GHz band. To be included in this catalog, a source has to have at least a 4.5-sigma or greater significance in at least one band.

Raw_Flux_150_GHz
The raw flux density of the mm source, i.e., uncorrected for flux density boosting, in the 150-GHz band, in mJy.

Flux_150_GHz
The deboosted flux density of the source at 150 GHz, in mJy. This value, the value plus the positive error and the value minus the negative value encompass 16%, 50%, and 84% (68% probability enclosed, or 1 sigma for the equivalent normal distribution) of the cumulative posterior probability density for the 150-GHz flux, as estimated using the deboosting procedure described in Section 3 of the reference paper.

Flux_150_GHz_Pos_Err
The upper (positive) 1-sigma uncertainty in the deboosted 150-GHz band flux density, in mJy.

Flux_150_GHz_Neg_Err
The lower (negative) 1-sigma uncertainty in the deboosted 150-GHz band flux density, in mJy.

SNR_220_GHz
The detection significance (S/N) of the mm source in the 220-GHz band. To be included in this catalog, a source has to have at least a 4.5-sigma or greater significance in at least one band.

Raw_Flux_220_GHz
The raw flux density of the mm source, i.e., uncorrected for flux density boosting, in the 220-GHz band, in mJy.

Flux_220_GHz
The deboosted flux density of the source at 220 GHz, in mJy. This value, the value plus the positive error and the value minus the negative value encompass 16%, 50%, and 84% (68% probability enclosed, or 1 sigma for the equivalent normal distribution) of the cumulative posterior probability density for the 220-GHz flux, as estimated using the deboosting procedure described in Section 3 of the reference paper.

Flux_220_GHz_Pos_Err
The upper (positive) 1-sigma uncertainty in the deboosted 220-GHz band flux density, in mJy.

Flux_220_GHz_Neg_Err
The lower (negative) 1-sigma uncertainty in the deboosted 220-GHz band flux density, in mJy.

Raw_Spectral_Index_1
The estimate of the spectral index of the mm source between 95 and 150 GHz based on the raw flux densities in each band. This is defined as the slope of the assumed power-law behavior of the flux density as a function of frequency between 95 and 150 GHz.

Spectral_Index_1
The estimate of the spectral index of the mm source between 95 and 150 GHz based on the deboosted flux densities in each band. This value, the value plus the positive error and the value minus the negative value encompass 16%, 50%, and 84% (68% probability enclosed, or 1 sigma for the equivalent normal distribution) of the cumulative posterior probability density for the spectral index, as estimated using the fluxes estimated from the deboosting procedure described in Section 3 of the reference paper.

Spectral_Index_1_Pos_Err
The upper (positive) 1-sigma uncertainty in the deboosted spectral index of the spectrum between 95 and 150 GHz.

Spectral_Index_1_Neg_Err
The lower (negative) 1-sigma uncertainty in the deboosted spectral index of the spectrum between 95 and 150 GHz.

Raw_Spectral_Index_2
The estimate of the spectral index of the mm source between 150 and 220 GHz based on the raw flux densities in each band. This is defined as the slope of the assumed power-law behavior of the flux density as a function of frequency between 150 and 220 GHz.

Spectral_Index_2
The estimate of the spectral index of the mm source between 150 and 220 GHz based on the deboosted flux densities in each band. This value, the value plus the positive error and the value minus the negative value encompass 16%, 50%, and 84% (68% probability enclosed, or 1 sigma for the equivalent normal distribution) of the cumulative posterior probability density for the spectral index, as estimated using the the fluxes estimated from the deboosting procedure described in Section 3 of the reference paper.

Spectral_Index_2_Pos_Err
The upper (positive) 1-sigma uncertainty in the deboosted spectral index of the spectrum between 150 and 220 GHz.

Spectral_Index_2_Neg_Err
The lower (negative) 1-sigma uncertainty in the deboosted spectral index of the spectrum between 150 and 220 GHz.

Frac_Sippd_Gt_Threshold
The fraction P(SI150-220 > 1.51) of the 150-220 GHz spectral index posterior probability density above the threshold value of 1.51. A higher value of P means the source is more likely to be dust dominated. This is detailed in Section 3.6 of Mocanu et al (2013, ApJ, 779, 61).

Source_Type
The mm source classification (synchrotron or dust dominated), based on whether P(SI150-220 > 1.51) is greater than or less than 0.5.

Ctrpart_Catalogs
This field contains numerical codes for external catalogs wherein a source has a match with an offset smaller than the chosen association radius, or is NULL if there are no matches. The external catalogs are described in Section 4.6 of the reference paper, and Table 4 provides the association radius for each catalog.

The authors searched several external catalogs for counterparts at the positions of all sources in the catalog. They queried the following catalogs which are coded as follows: 

  Code                   Catalog

  1 - The Sydney University Molonglo Sky Survey (SUMSS; Mauch et al. 2003,
      MNRAS, 324, 1117) at 36 cm (843 MHz).
  2 - The Infrared Astronomical Satellite Faint Source Catalog (IRAS-FSC;
      Moshir et al. 1992, IRAS Faint
      Source Survey) at 12, 25, 60 and 100 micron.
  3 - The Australia Telescope 20 GHz Survey (AT20G: Murphy et al. 2010, MNRAS,
      402, 2403) at 1.5 cm.
  4 - The Wide-field Infrared Survey Explorer (WISE) AllWISE Source Catalog
      at 3.4, 4.6, 12, 22 micron.
  5 - The Parkes-MIT-NRAO (PMN; Wright et al. 1994, ApJS, 91, 111) Southern
      Survey at 4850 MHz.
  6 - The Infrared Astronomical Satellite AKARI/FIS Bright Source Catalog
      (Yamamura et al. 2010, ISAS/JAXA) at 65, 90, 140, and 160 micron
  7 - The Infrared Astronomical Satellite AKARI/IRC Point Source Catalog
      (Ishihara et al. 2010, A&A, 514, A1) at 9 and 18 micron.
  8 - The ROSAT All-Sky Survey Bright Source Catalog (RASS-BSC: Voges et al.
      1999, A&A, 349, 389) and the RASS Faint Source Catalog (RASS-FSC: Voges
      et al. 2000, CDS Cat. IX/29) at X-ray energies 0.1-2.4 keV.

Extended_Flag
This flag parameter is set to 'Y' for extended sources. Otherwise, it is set to 'N'. Section 4.7 of the reference paper describes this determination.

Redshift
The redshift for the SPT catalog sources, as obtained from a combination of follow-up observations and the literature, using the NASA/IPAC Extragalactic Database (NED) and an association radius of 0.6 arcmin. 743 sources in the catalog have identified redshifts; the others are set to NULL.

Selected_Flags
These flag parameters describe selection cuts for the source, which assists with comparing the number counts with models and characterizes the source populations, using extendedness and external cross-match information. The flags are coded as follows: 

  1 - extended sources or detected as multiple detections but confirmed to be a
      single object, as described in Section 4.7 of the reference paper. (131
      sources)
  2 - low-redshift objects (z<0.1), which removes extended sources more
      systematically than the previous criterion (461 sources)
  3 - dust-dominated sources that are also low-redshift (z<0.1), including IRAS
      cross-matched sources (506 sources)
  4 - sources identified as stars (10 sources)

Contact Person

Questions regarding the SPTSZSPSC database table can be addressed to the HEASARC User Hotline.
Page Author: Browse Software Development Team
Last Modified: Tuesday, 21-Jul-2020 18:16:38 EDT